Ammonia-pump mechanism for refrigeration.



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Patented J une 26 F'. M. GEISENDORFF.

APPLICATION FILED MAR. 21. |915.

AMMONIA PUMP MECHANISM FOR HEFRIGERAION.

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F. IVI. GEISENDORFF. AMMONIA PUIVIP NIECHANISM FOR REFRIGERATION.

APPLICATION FILED MAR. 2?. 1915- LQBLIO,

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entre snaai-ae rnannr ernten FREDERICK IVI. GEI-SENDORFF, OF INDIANAPOLIS, INDIANA, ASSIGNOR OF ONE-HALF TO CHARLES Vf. ZIEGLER AND ONE-SIXTH TG CHARLES HAMBIJEN, BOTH OF INDIAN- APOLIS, INDIANA. l

AMMONIA-PUMP MECHANISM FOR REFRIGERATIGN.

Application filed March 27, 1915.

T 0 all Awhom it may concern.' y

Be 1t known that l, FREDERICK M. Ginsen- Doi-rrr, a citizen of the United States, and a resident of Indianapolis, `county of Marion, and State of Indiana, have invented acertain new and useful Ammonia-Pump lflechanism for Refrigeration; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, in which like letters refer to like parts.

The object of this invention is the automatic prevention of the superheating of the valve in a refrigerating device or ammonia pump or like situation. While the invention is primarily for such use, it involves a double valve which may be used in other combinations than that above suggested.

In an ammonia pump the valve controlling the inlet to the' ammonia pump is highly chilled by the incoming ammonia, while the valve controlling the outlet from the pump becomes heated `because of the passage of it by the ammonia while under high pressure. l/Vater jackets and other means have heretofore been `employed for cooling the last-mentioned valve and it has often been diiiicult to protect it from the heat.V

The object of this invention is to keep said .second valve cool without any additional means aside from the bare necessities of the valve construction.

The chief feature of the invention consists in associating the two valves together so that they will control the temperature of each other. As herein shown, the valve controlling the outlet is located within the valve controlling the inlet of the ammonia. Hence, the outlet controlling valve will always be kept at a reasonable temperature by the surrounding inlet controlling valve. There is also a corresponding reaction, to a lesser degree preferably, of `the inlet valve and the outlet valve. l

The full nature of the invention will be understood from the accompanying drawings and the following description and claims:

In the drawings, Figure 1 is a central vertical section through the end of an ammonia pump cylinder and associated valve structure with the parts in idle position. Fig. 2 is a section on the line 2-2 of Fig. 1. Fig. 3 is a section on the line 3-3 of Fig. 1.

Specification of Letters Patent.

Patented J une 26, 191%'.

Serial No. 17,509.

Fig. el is a similar section on a larger scale thro-ugh the pump cylinder and valve structure showing the parts in position during the intake. Fig. 5 is'the upper `part of what is shown in Fig. et, with parts in their position during the compression movement of the pump.

rlhis device, as stated, was primarily devised for use in connection with refrigerators and pumping ammonia for refrigerator use.

There is a pulnpcylinder 10 with a piston 11 and upon the upper end of the cylinder there is a valve casing 12 secured. There is an inlet pipe 13 leading from some source of ammonia through a port 1e in said valve casing and there is a discharge pipe 15 leading from a discharge port 1G in said casing to the refrigerator. The casing 12 has an inwardly extending annular hase ring or flange 17 at its lower end and a ring 1S at about a middle point. A cylinder' 2O is secured to the lower half of the case, being supported on the base ring 17 and surrounded and held in place by the intermediate ring 18. Said cylinder has a pair of ports Q1 on the opposite sides thereof in the form of vertical slots and communicating with a chamber Q2 surrounding said cylinder E20.

Hthin the cylinder 2O there is an inlet or outer valve cylinder 2li vertically movable and having an annular flaring valve 25 on the lower end thereof and a pair of vertical slots or ports E2G on the opposite sides thereof. A spiral spring 27 surrounds said valve cylinder and its lower end rests on an inwardly projecting annular shoulder 28 at the lower end of the cylinder 2O and the upper `end ofthe spring bears against a ring Q9 securedv around the upper end of the cylinder 24k. This spring normally holds the valve 25 elevated and closed, as shown in Fig. 1.

The outlet or inner valve casing 30 'is cylindrical and its lower end projects into the outer valve cylinder 2e and is substantially flush with the lower end of said valve cylinder when it is in its upper or normal position. A laterally extending flange 31 from the upper end of the inner valve casin g is secured upon the cylinder 2() and it is held down by a cylinder 33 resting upon it and with a closed top extending to the top of the main valve casing 12. There is a central extension 34 from the upper end of the in- 1 ner valve casing 30 having a cross piece 35 which guides the valve stem 36 of the inner valve 37. This valve is beveled and seats in the tapering lower end of the inner valve case 30. A ring 38 is secured by radial arms to and around the valve stem 36 and moves upward with said valve stem. There are ports 39 in the side walls of the extension 341: and openings 40 in the side walls of the cylinder 33 and a chamber A1 within the main outlet casing 12 and extending up to the outlet port 16. The lower end of the inner valve case 30 is beveled on its outer edge and also the inwardly extending flange 28 from the cylinder 20 is beveled on its inner edge to furnish a suitable seat for the annular outer valve 25. A spiral spring 43 surrounds the valve stem 36 and bears at its upper end against the top 35 of the extension 34 and at its lower end on the ring 3S. The purpose of this spring is to close the inner valve 37.

The operation is as follows:

On the downward movement of the pump piston 11 the outer valve is drawn down against the casing ofits spring by the suction and ammonia ent-ers from pipe 13 through ports 14, chamber 22 and ports 21 and 26 into the pump cylinder 10. The upper position of the parts is illustrated in Fig. 4. On the upward or return stroke of the pump piston, the outer valve 25 is elevated and seated by the pressure in the cylinder and the inner valve 37 is elevated and opened against the influence of its spring and then the ammonia passes through the inner valve casing 30, ports 39, 40, 41 and 16 to the discharge pipe 15. Again on the down stroke of the pump piston the inner valve is thrown closed and the outer valve thrown And so far as this invention Y valve structure will be kept cool by theV inner valve structure.

The invention claimed is: 1. The combination with a pump, of a cylindrical valve structure for controlling the inlet to the pump, and a valve structure controlling the outlet therefrom which is located within the valve structure for controlling the inlet so as to be kept cool by the inlet controlling valve structure.

2. The combination with a pump, of a valve casing secured thereon having an inlet port and an outlet port, a valve structure in said valve casing for controlling the inlet to said pump from said inlet port, and a valve structure within said casing for controlling the outlet from the pump to said outlet port, one of said valve structures being located within the other.

3. The combination with a pump, of an outer valve casing secured thereto having near its lower end an outlet port, a vertically movable outer valve cylinder within said casing having an annular valve on its lower end, ports therethrough communicating with the inlet port, a spring tending to hold said outer valve cylinder and valve elevated and closed, an inner valve casing stationary and extending down into said outer valve cylinder with its lower end open and Y having an outlet port through its upper end, an inner valve within said inner valve casing, and a spring within said inner valve casing tending to hold said inner valve closed. v

In witness whereof, I have hereunto affixed my signature in the presence of the witnesses herein named. y

FREDERICK M. GEISENDORFF. Witnesses:

J. H. WELLS, R. G. LocKwooD.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents,

' Washington, D. C. 

